1. Heat a 6-quart heavy stove-top casserole and add the lard or oil and paprika.
2. Saute the paprika for about 1 minute and add the onions. Saute for a few minutes and add the remaining ingredients, except the thickening, to the pot.
3. Bring to a simmer and cool, covered, for about 45 minutes to 1 hour or until all is tender. Remove the chicken pieces and set aside.
4. Mix the sour cream and flour well, using a wire whisk. Add 1 cup of the gravy from the pot to the cream and stir well to avoid lumps.
5. Stir this mixture into the pot and stir while it thickens. Return the chicken to the pot and restore the heat.